Apparatus for casting hollow metal bodies.



PATENTED Nov. 3, 1903.

P. DBHEMPTINNB. APPARATUS POR CASTING HOLLOW METAL BODIES.

APPLICATION FILED NOV.13,1902.

UNITED STATESv Patented November 3, 1903.

PATENT omc..

APPARATUS Foa CASTING HoLLow METAL Boules.,`

SPECIFICATION forming part of Letters Patent No. 743,077, dated` November 3, 1903.

l Application filed November 13, 1902. Serial No. 131.099. (lilo model.)

To a/ZZ whom it may concern.- Y ,Y Be it known that I, PAUL DE HEMPTINNE,'=a subject of the King of `Belgium, residing at Ghent, Kingdom of Belgium', have invented certain new and useful Improvements in Apparatus for Casting `Hollow Metal Bodies,

fully described and represented in the fol-V lowing specication and the accompanying drawings, forming a part of the same.

This invention relates to apparatus for castin ghollow ingots, particularly of steel or other metals. Attempts have' been made heretofore by others to produce an apparatus for castingsuch ingots bythe use ofa rotating mold; but such attempts have not to my knowledge been successful. The failureV of such attempts has been largely .if not en` tirely, due to the rapid cooling of the molten metal before a proper distribution thereof in the mold-has been eiected and to vibrations.

or variations in speed of Arotation of the mold. My invention avoids these diculties and provides a practically successful apparatus for accomplishing the desired operation.

As a full understanding of the invention can best be given by a detailed description of a construction embodying the features of the invention vin the preferred form, such a description will now be given in connection with the accompanying drawings, showing such an apparatus. v

In said drawings, Figure lis a central longitudinal sectional view. Fig.'2 is a sectional view taken on the `line 2 of Fig. 1, and Fig. 3 is an enlarged detail sectional view of onev of the roller-bearings.

Referring to the drawings, the mold is preferably formed of a cylindrical tube 10 of suit- "able material, having at one end a cap 11,

which carries a hollow `shaft 12, and having at the other end a cap 13, formed with a central opening 14. for the introduction of the- The caps 1l and 13. are prefthe tube 10 to permit of their'being taken 0E for removing the cast ingot from the moldl and for' permitting caps 13 having differentsize openings 14 to `be used and for permitting different mold-tubes to be used-with the v same caps. y 'f Y, g

The shaft 12 is rotatably mounted ina universal bearing-that is, a bearingadapted. to

l a central zone of a sphere.

-y per-mit slight Changes in the direction of the axis of the mold Without interferingwith the adjustment of the bearing, without produc ing any binding in the bearing which might result in variations of speed of rotation of the mold, and Without permitting any play in the bearing. For this purpose the shaft preferably carries a bearing-sleeve l5, which is jour- 'naled in a bearing-block 16, the bearing-faces of whichrsleeve and block are in the form of The shaft 12 also carries a driving-pulley 17. The mold is also supported by a bearingwhich engages an annular bearing on the lbody of the mold at a point` between the ends `thereof and vnearer the entrance. end andV is constructed so as to be automatically expansible to accommodate itself to the expansion and contraction of the mold due to heating and cooling. `For this purpose `there is preferably provided a rollerbearing comprising, preferably, three rollers,

18, arranged triangularly,'and' one at `least held in place under yielding tension, which Awill permit it to. move away from the other two for theipurpose'of causing the bearing to accommodate'l itself to the expansion and contraction-of the mold-body. The twostationary bearing-rolls arepreferably arranged substantially in the same horizontal plane and serve assupportingrolls for the mold,

. and the movable bearing-roll is preferably carried by a bracket or arm 19, pivotedat one side of the mold and `extending over the mold and pressed downward by means'of a spring 20, which; is held under adjustable tension by means of' a screw-,collar 21 on an upwardly-.projecting pivoted rod 22. The arm 19 and rod 22 are or may be mounted on a frame 23, which supports the two stationary bearing-rolls. The bearing-rolls 18 are preferably mounted on antifriction ballbearings, which may be of any suitable construction or asfshown in Fig. 3.

The molten metalis introducedinto ther mold through a nozzle'2'i5, which is mounted tofprojec't through the opening 14 and 'into the mold, extending with its end some distance inside the `innerface of the cap 13.

The nozzle 25 is preferably 'slightly inclined and tapered. and connects with a hopper or chamber 26, into which the metal is poured. AThe opening14 should be of such 'size with the mold in the rapid relation to the nozzle as to leave anairpassage around the nozzle for permittin g air to be drawninto the mold with the molten metal, such air escaping through the hollow shaft 12 and aiding by its-movementthrough distribution of the molten metal. l

In the operation of is first started rotatingat-a high rate of speed which should Abe not less than six hundred to seven hundred andfty revolutions per minute. The molten metal is then introduced into the mold through the nozzle 25. As the metal enters the'mold it will be thrown against thesides of the, mold, and aided by the entrance of air through the opening 14 around the' nozzle and thel exit of air through the hollow shaft 12'the metal will advance rapidly in the mold in a` spiral path to uform a body having an'outside shape corresponding to the inner surfaceiof the mold andhaving a central longitudinal opening therethrough.

The size of the nozzle should be varied acv cording tothe size of fthe ingots to be cast and it should extend more or less into the mold. The size of the opening 14 also should be varied according to the size of the nozzle and the speed of entrance of the metal and rotation of the mold.

1. In an apparatus for lcasting hollow ingots, the combination of al .horizontally-arranged mold having a central opening at one end, auniversal bearing in which the vopposite end of the mold nis self-adj ustably, journaled, an automatically-expansible bearing having an oddnumb of bearingmembers for engaging and su ,porting the body of the' mold at a point between the ends thereof whereby lthe meld is capable of being rotated at great speed without vibration, a nozzle for introducing molten metal through the central opening in the end ofthe mold, and means for rotating the mold, substantially as de- 45.

scribed. i

2. AIn an apparatus for casting hollow ingots, the combination of a horizontally-arranged mold having a central opening at one end, a universal bearing in which the lopposite end` of the -mold is self-adjustably journaled, an automaticallyexpansible bearing having an odd 'number of bearing members for engaging and supporting the body ofthe mold `at a point betweenithe ends thereof whereby the mold is capableofbeing rotated atgreat speed without vibration, a nozzle adapted to extend through the central openi ing into the mold-chamber beyond the inner face of the'end of the'mold, the nozzle and said opening being of a size to provide an airinlet around the nozzle and the mold being provided at its opposite end with an air-outlet, and meansfor rotating the mold, substantially asde'seribed. j

3. In an apparatus for casting hollow ingots, the combination of a horizontally-arranged mold having one end partially closed the apparatus the mold maori by a cap having a central opening, a universal bearing in which the opposite end of the mold is self-adjustably journaled, an antomatically-expansible bearing having an odd number of bearing members for engaging and supporting the-body of the mold at a point between the endsthereof whereby the mold is capable of being` rotated at great speed zle and the mold being provided at its opposite end with an air-outlet, and means for rotating the mold, substantially as described.

4. In anapparatus for casting hollow in- -gots, the combination ofa horizontally-arranged mold'having a central opening in one end, a bearing in which the other end of the mold is self-adjustably journaled, a bearing supporting the body of the mold` between the ends thereof, having three members and means permitting one of said members to move away from the other two against yielding. tension whereby the bearing willl automatically accommodate itself to the expansion and contraction of the mold, a nozzle vfor introducing molten metal through the central opening inthe end of the mold, and means for rotating the mold, substantially as described. l

5. In an apparatusI for casting hollow inlranged mold having a central opening in one end, a bearing in which the other end of the mold is self-adjustably journaled, a bearing from the pair of rolls against yielding tension whereby the bearing will automatically ac- -molten metal through the central opening in the end'of the mold, and means for rotating the mold, substantially as described.

gots, the combination. of a horizontallyarranged mold having one end partially closed by a cap having a central opening, a bearing in ,which the other end of the mold is selftend through the opening in the cap into the mold beyond the. inner face of said cap, a bearing supporting the body of the mold between the ends thereof having three bearing members and means for permitting one of said members to move away from the othertwo against yielding tension whereby the bearing will automatically accommodate itself to the expansion and contraction ofthe mold,and means for rotating the mold, substantially as described.

'i 7. In an apparatus for casting hollow insupporting the body of the mold between the withoutvibration, a nozzleladapted to extend ICO gots, the combinatioupof a horizontallyarcommodate itself to the expansion and contraction of the mold, a nozzle for introducing 6. I nfan apparatus for casting hollow in- I adjustably journaled, a nozzle adapted to eX- gots, the combination of a 'horizontally-arranged mold suitably journaled at one end in a universal 'bearing and having its other end partially closed by a removable cap having a central opening, an automatically-ex-- pansible bearing having an `odd number of bearing members for engaging and supporting the body of the moldat a point between the ends thereof, whereby the mold `is ca-4 pable of being rotated at great speed without vibration, a nozzle for introducing molten metal through said central opening, and means for rotating the mold, substantially as described. Y

8. In an apparatus for casting hollow ingots, the combination of a horizontally-arranged mold suitably jourualed at one end in a universal bearing and having its other end partially closed by a removable cap having a central opening, an' automatically-ex# pansible bearing. having an odd number of bearing members for engaging and supporting the body of the mold at a point between the ends thereof,'whereby the mold iscapable of being rotated at great speed without b vibration, a nozzle for introducing molten metal through said central opening, said nozzle and opening being of a size to-provide an air-inlet around the nozzle and the mold being provided, at its opposite end with an air-outlet, and means for rotating the mold, substantially as described. if

9. In an apparatus for casting hollow ingots, the combination of a horizontally-arranged mold suitably jornaled at one end in a universal 'bearin g and having a central opening in the other end thereof, a bearing supporting the body o'f the mold between the ends thereof, said bearing being provided with an odd number of bearings and adapt'- ed to automatically accommodate itself to the expansion and contraction of the mold, a nozzle for introducing molten metal through the central opening, said nozzle and the opening being of a size to provide an air-inlet around the nozzle and the inold being provided at its opposite end`with' an air-outlet, and means for rotating the'inold, substantially as described. l o

'Ina testimony whereof I'have hereunto set my hand in the presence'of two ,subscribing Witnesses. v

Y PAUL DE IIEMPTINNE.

Witnesses:

JULIUs A'. VAN VHirn,

` MICHEL DE VRIES. 

